36981666 has 12 divisors (see below), whose sum is σ = 80126982. Its totient is φ = 12327216.

The previous prime is 36981653. The next prime is 36981671. The reversal of 36981666 is 66618963.

It can be written as a sum of positive squares in only one way, i.e., 32251041 + 4730625 = 5679^2 + 2175^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1027251 + ... + 1027286.

Almost surely, 2^36981666 is an apocalyptic number.

36981666 is an abundant number, since it is smaller than the sum of its proper divisors (43145316).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

36981666 is a wasteful number, since it uses less digits than its factorization.

36981666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2054545 (or 2054542 counting only the distinct ones).

The product of its digits is 279936, while the sum is 45.

The square root of 36981666 is about 6081.2552980450. The cubic root of 36981666 is about 333.1671373727.

The spelling of 36981666 in words is "thirty-six million, nine hundred eighty-one thousand, six hundred sixty-six".